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Tear Jerker: Pluto
The death of Robbie the police robot in Pluto, complete with Gesicht visiting his wife. Mind you it's only chapter 1. This editor already has several bedsheets handy, just in case.
Oh, yes. When they started this scene, this troper was like "robot families? And they want to make this sad and moving? Are you kidding?" Few more panels had this troper cry like a baby. Other scene worth mentioning is main character's "child" getting cruelly and pointlessly killed by some fanatic
The death of Mont Blanc is not only saddening on its own, it's also pretty gruesome and gory; mind also that it's chapter 1 as well and we're talking about a robot as well. The homages of the Swiss people are also tremendously heart wrenching.
Lets not forget a flashback, juxtaposing the two families of two robotic children killed by the same guy who also killed Gesicht's child. The human family showed grief and pain emotionally and visibly. The robotic family...they had no visible emotions, however...it's like the Simpsons' quote, "Why was I programmed to feel pain?", except played straight for drama.
Chapter 6 is like this too. "Don't sing out there. Come back to me. It's time to practice your piano." Sorry, got something in my eye...
Don't know if Tear Jerky enough, but Atom's first appearance at the end of the first volume overwhelmed this Troper. He just looks so... child-like.
Chapter 24. The robot dog. The little robot dog trying to stand up and play as it's DYING. Hackeneyed or not, DAMN YOU URASAWA.
Also, the efforts of Prof. Ochinomizu to try to repair it are also really sad. Ochinomizu fails to repair it and it dies, prompting the professor to shed tears for its death.
In Chapters 33 and 34, Hercules recalls seeing a shell-shocked robot after a battle, desperately trying to wash his hands under a broken water pipe, saying "It just won't come out."
Chapter 46, Gesicht is utterly heart-broken when he sees Ali who then points a cluster cannon at him.
Actually, just about anything having to do with Gesicht is a major tearjerker.
Chapter 47, especially the ending. "Excellent. It can be for pretend, first...The pretense will turn real with time. You will learn to truly cry, as I do.".
I was close to tears (then crying)during chapter 54, especially the last few pages Epsilon throwing his arms away to protect Wassily now defenceless against Pluto. Then wondering where "myself" is killed. What tipped me over was the guard robot saluting such a brave robot. And then stuff goes From Bad to Worse.
"We're keeping you with us 'til the end of the world."
Brando's death. Even better is that he's patched in with Atom, Gesicht and Hercules at the time, so they all get to listen to him die.
What even makes this worse is the fact that Brando's attempts to give the group anything as to see what they're all dealing with is rendered pointless as Brando's life flashes before his eyes, mainly images of his family who he won't be returning to.
Dr. Hoffman and Helena mourning Gesicht's death. Specially sad, since it didn't have as much in-universe coverage as the deaths of Brando, Hercules and Epsilon. Helena's crying is specially painful as it's the first time she's cried EVER, since she is a robot like her late husband.
Pluto's final sacrifice to destroy Bora and his farewell to Uran... snif.